After working for a long time,.但为什么是Having worked for a long time

题目

After working for a long time,.但为什么是Having worked for a long time
After working for a long time,.
但为什么是Having worked for a long time.
第一个怎么不用AFTER HAVING WORKED..

答案

结构不同嘛
首先,
After working for a long time,.它是个介词短语,
Having worked for a long time.它是个分词短语,
其次,表达的意思也是不同的,
一两句说不清,你可以结合全句体会